High-pressure liquid-jet gun

Abstract

A high-pressure liquid-jet gun has a pistol-type housing provided with a valve having an actuation member displaceable between a closed position and an open position to release liquid from an end of the housing. A safety lever is displaceable on the housing between a safety position relatively far from the barrel of the housing and a use position lying against this barrel. A spring urges this safety lever into the safety position. A trigger is pivoted on the safety lever and has a formation which is engageable only in the use position of the safety lever with the actuation member. This trigger can be displaced in the use position of the safety lever between an advanced position with the formation engageable with the actuation member but with this actuation member in the closed position, and a drawn-back position with the formation pressing the actuation member of the valve into the open position.

We claim: 
     
       1. A high-pressure liquid-jet gun comprising: a housing;   valve means including an actuation member on said housing displaceable between a closed position and an open position for releasing a liquid from an end of said housing on displacement of said actuation member into said open position;   a safety lever on said housing displaceable between a safety position relatively far from said housing and a use position relatively close to said housing;   biasing means urging said safety lever into said safety position; and   a trigger mounted on said safety lever and having a formation engageable in said use position of said safety lever with said actuation member, said trigger being displaceable in said use position of said safety lever between an advanced position with said formation engageable with said actuation member and with said actuation member in said closed position, and a drawn-back position with said formation engaging said actuation member and holding same in said open position, said formation being unengageable with said actuation member in said safety position of said lever.   
     
     
       2. A high-pressure liquid-jet gun comprising: a housing;   means including an actuation member on said housing displaceable between a closed position and an open position for releasing a liquid from an end of said housing on displacement of said actuation member into said open position;   a safety lever on said housing displaceable between a safety position spaced from said housing and a use position relatively close to said housing;   a trigger pivoted on said safety lever and engageable in said use position thereof with said actuation member, said trigger being displaceable in said use position of said safety lever between an advanced position with said actuation member in said closed position and a drawn-back position with said actuation member in said open position; and   biasing means urging said safety lever into said safety position.   
     
     
       3. The gun defined in claim 2 further comprising means urging said actuation member into said closed position. 
     
     
       4. The gun defined in claim 3 wherein said means including said actuation member also includes a valve connectable in a high-pressure line and only open in said open position of said actuation member. 
     
     
       5. The gun defined in claim 2 wherein said pistol has a handgrip against which said trigger lies in said drawn-back position and from which it is spaced in said advanced position. 
     
     
       6. The gun defined in claim 5 wherein said housing has a barrel extending toward and defining said end, said lever lying against said barrel in said use position, said lever and trigger being spaced so far apart that they cannot be displaced into their respective use and drawn-back positions by one hand at the same time. 
     
     
       7. The gun defined in claim 5 wherein said housing includes a trigger guard, said biasing means including a spring engaged between said guard and said safety lever. 
     
     
       8. The gun defined in claim 2 wherein said lever and said trigger are both at least partly U-shaped and have respective pairs of trigger and lever cheeks, said lever cheeks being pivoted on opposite sides of said housing and said trigger cheeks being pivoted on respective lever cheeks. 
     
     
       9. The gun defined in claim 2 wherein said trigger has a formation engageable in said use position of said lever with said actuation member and unengageable with said actuation member in said safety position of said lever. 
     
     
       10. The gun defined in claim 2 wherein said lever and said trigger are both at least partly U-shaped and have respective pairs of trigger and lever cheeks, said lever cheeks being pivoted at a back pivot axis relatively far from said end on opposite sides of said housing and said trigger cheeks being pivoted at a front pivot axis closer to said end than said back axis on respective lever cheeks.